512 



U.S. NATIONAL MUSEUM BULLETIN 288 



than second, just reaching to disk of third which more than covers 

 the tympanic area; no projecting rudiment of a pollex; no ulnar 

 ridge; humeral spine palpable but not protruding. Toes completely 

 webbed, the web extending as a narrow margin to base of disk of 

 fourth toe; third and fifth toes subequal, disk of fourth toe about 

 covering the tympanic area; a distinct oval inner and a smaller in- 

 distinct rounded outer metatarsal tubercle; no tarsal ridge; no dermal 

 appendage on heel. Body moderately elongate, in postaxillary region 

 a little narrower than greatest width of head; when hind leg is ad- 

 pressed, heel reaches well beyond tip of snout; when limbs are laid 

 along the side, knee reaches axilla; when hind legs are bent at right 

 angles to body, heels considerably overlap. No patagium present. 

 Skin of upper parts smooth. No discernible narrow glandular ridge 

 encircling upper part of tympanum; skin of throat and chest smooth, 

 that of belly and lower surface of thigh uniformly and very finely 

 granular; traces of a skinfold across chest; adult female, no vocal sac. 

 Skin of head not co-ossified with skull, roof of skull not exostosed. 



Figure 52—Centrolenella medemi, holotype, USNM 152277 (X 2). 



